Biology

what is allele?differentiate between gene and allele.
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can be used by cells to store energy, form biological membranes, and serve as chemical messengers. A) Carbohydrates B) Fructose C) Glucose D) Lipids
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Which organelle provides protection and support to a cell? Cell wall Cytoplasm Nucleus Ribosome
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economic importance of earthworm
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Which concept is not a part of the theory of evolution
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In attempting to find the causative agent for a particular disease, you find that the agent remains infectious even after treatment with DNAse, an enzyme that degrades DNA. What could the disease's causative agent be?
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A mutation in an acidic keratin in an epithelial cell leads to a fragile epithelial cell layer. Which of the following processes is most likely prevented by this mutation?a) actin treadmillingb) nuclear lamina assemblyc) nuclear lamina disassemblyd) binding of keratin to cadherine) assembling keratin fibers
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Common cold spreads faster and is difficult to control,Give reason .
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Mrs. Leonard calls the office because her 3-year-old child has been stung. She thinks it was a wasp, but she isnt sure. She says he is having trouble breathing, is very restless, his head hurts very badly, and his skin is becoming mottled and blue. What instructions should be given to Mrs. Leonard?
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Two steel balls that are the same mass and size are rolled with the same force across different level surfaces.The ball rolling across carpet will come to a stop faster than the one rolling across concrete because ofA)air resistance.B)friction.C)gravity.D)speed.
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In the family tree below, people with the recessive trait of attached earlobesare shaded gray.What must be true about the person labeled "A"?OA. It is a female with two dominant alleles.OB. It is a female with at least one dominant allele.OC. It is a male with at least one dominant allele.OD. It is a male with two dominant alleles.
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Which items are used to show elevation, relief, and slope on a topographic map? Check all that apply.topographic linescontour linesindex contourstopographic symbolscontour intervaltopographic intervalindex topography
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Scientific concepts and principles
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__________denotes the spatial arrangement of a molecule that is determined by the presence of either double bonds or chiral centers. refers to the spatial arrangement of substituted groups that are free to assume different positions in space.A) Primary structure; Secondary structureB) Conformation; ConfigurationC) Allosterism; Dynamic steady stateD) Configuration; ConformationE) Secondary structure; Tertiary structure
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The GFP fusion with Sec61 localizes in a pattern that is consistent with the endoplasmic reticulum. In contrast, Sec33 localizes in the Golgi compartment.Although both Sec61 and Sec33 are both involved in secretion, do their localization patterns suggest that they have different roles? Why?
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People who are tune deaf are unable to follow a rhythm. Scientists have evidence that tune deafness can be genetic. The pedigree below traces the inheritance of tune deafness in a family. Individuals in the pedigree are numbered.
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Why is the mixing of fresh water and salt water in the bay important?
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Which word refers to the smallest functional unit of a living thing?celleyelashorgantissue
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The standard free energy change for a reaction under standard biological conditions is 15 kJ/mol. What is the equilibrium constant for the reaction?
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Mendel's experiments with pea plants demonstrated the law of dominance: traits are inherited as dominant and recessive alleles, and the dominant allele for a trait can mask the presence of the recessive allele. Occasionally, that law is contradicted: offspring exhibit a blend of their parents' traits. For example a red flowering plant when crossed with a white flowering plant would produce a plant with pink flowers. In a genetic cross between a homozygous red flowering plant and a heterozygous pink flowering plant, predict the probability of having offspring with red flowers.
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Drosophila (fruit flies) usually have long wings ( ), but mutations in two different genes can result in bent wings (bt) or vestigial wings (vg). If a homozygous bent wing fly is mated with a homozygous vestigial wing fly, which of the following offspring would you expect?a. All +bt +vg heterozygotesb. 1/2 bent and 1/2 vestigial fliesc. All homozygous + fliesd. 3/4 bent to 1/4 vestigial ratioe. 1/2 bent and vestigial to 1/2 normal
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Phosphate groups are added after the glucose molecule splits. An oxidation reduction reaction must take place for this to happen. One molecule is oxidized (and oxygen is added a phosphate) while another molecule is reduced. What is the name of the reduced molecule?
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Cells must use energy to move a substance against a concentration gradient i.e., from a compartment with a low concentration of the substance to a compartment with a higher concentration). Which of the following processes would require a cell to expend energy? Choose all of the correct answers a. Transport of sodium ions OUT OF cells b. Transport of sodium ions INTO cells c. Transport of potassium ions OUT OF cells d. Transport of potassium ions INTO cells e. Transport of calcium ions OUT OF cells f. Transport of calcium ions INTO the cytoplasm of a cell from the ECF g. Transport of calcium ions OUT OF the cytoplasm of a cell and INTO an organelle that has a high concentration of calcium ions. h. Transport of calcium ions OUT OF an organelle that has a high concentration of calcium ions and INTO the cytoplasm of a cell.
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Atrial pressure is greater than ventricular pressure during which phase of the cardiac cycle? A. atrial contraction B. isovolumetric relaxation C. ventricular ejection D. isovolumetric contraction
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